These amiable, intelligent dogs learn very quickly and get bored repeating similar training exercises so mix things up with toys, games and jumps. Although they do require extra care to teach them not to jump onto people- they are motivated by praise and food so can be easily trained not to do so. Weimaraners are not great with the cold-  dog jackets can help to keep them warm during particularly harsh winters. Celebrity owner: Brad Pitt.